Ski stick



March 3, 1942.

F. TVETEN SKI STICK Fiied June 28, 19:s9

r w M 4 2 9m fin/M r W w 6 We 7 7 2P QW Z 7 56 4 2 5 3 3 /v parts beingtelescopically displaceable within ach Patented Mar. 3, 1942 UNITEDSTATES PATE NT OFFICE 2,215,330 SKI STICK Finn Tveten, Oslo, NorwayApplication June 28, 1939, Serial No. 281,715

Norway June 29, 1938 tubings, say aluminium or steel 'tubings, fixedtogether in a suitable manner, at least two of these other in order tomake a variation of the le th of the sticks possible.

The invention has for itsobject to provide a device, by means of whichthe displaceable parts in a simple and trusty manner can be lockedtogether in any desiredposition and also loosened from each other in asimple manner. v

The main characteristic feature of the invention is, that the lockingtogether of the displaceable parts is effected by means of a deviceoperating in accordance with the wedge principle. Further features ofthe invention will appear from the following description of anembodiment of the device.

-In order to describe clearlymy invention I will refer to theaccompanying diagrammatical drawing, wherein:

Figure 1 shows a ski-stick, consisting of three pieces of tubing,

Figure 2 a longitudinal section through the two uppermost displaceablepart in an enlarged scale, and

1 Figure 3 a longitudinal section through another construction of thelocking device.

According to Figure 1 the ski-stick may consist of three pieces of steeltubing I, 2 and 3 placed inside each other at the joints 4 and 5. Allthe tubings are cylindrical, the uppermost tubing I having the largestdiameter, while the diameters of the tubings 2 and 3 correspond to theinner diameters of the tubing; I and 2 respectively. The tubings 2 and 3are fixed together at the joint 5 for instance by means of welding or inanother suitable manner.

In order to make it possible to lengthen and shorten the ski-stick sothat the length of the same may suit anyone, the joint I is constructedlower end of the tube 3 Claims. (01. ciao-11.37)

engage with a cone III axially placed in the skistick.

When said cone is moved axially upwards,- the I is expanded, whereby thetube 2 is pressed firmly between the tubes 6 and 1. One or more of thecontacting tubesurfaces ought to be grooved or rough in order to makethe friction in the Joint I as great as possible. Furthermore the lowerpart of the tube I and eventually also the upper part of the tube 2 maybe splitted in order to facilitate the expansion of the same when thecone III is moved upwards.

The mechanism for moving the cone I 0 consists of an axial rod II, thelower end of which is provided with threads I2 engaging withcorresponding threads in an axial hole in the cone. The rod II,extending to the top of the ski-stick,

. is provided with a suitably shaped head or the like I3, by means ofwhich the rod can be turned. The edge of said head in usual manner isprovided with grooves for increasing the friction against the hand whenturning the rod. Further, the lower side of the head is provided with aguiding edge I4, fitting into the tube I.

When the rod II is being turned in a certain direction, the cone Ill,the turning of which is prevented by friction or by other suitablemeansnot in such a manner, that the tubing 2 can be disthe tubing I andlocked in by means of devices as destick with the joint 4 is shown inFigure 2 in an enlarged scale. According to this construction the upperend of the ski-stick consists of two concentrical tubes 6 and I placedwithin each other with an interspace 8, in which the upper part of thetubing 2 is displaceably placed. The lower end of the tube 1 internallyis provided shown on the drawing, will be screwed upwards and therebypressed against the inclined surfaces 9, so that the tube 1 owing towedge-effect is expanded and thereby locking the tube 2 firmly to theouter tube Ii. When the rod II is being turned in the opposite directionthe cone will be screwed downwards, whereby the pressur against theinclined surfaces 9 is released. The tube 2 now may be moved axially andtherebythe length of the ski-stick changed, whereafter the locking iseffected by screwing the cone I0 upwards.

The inner tube 1 eventually may be dispensed with, in which case theinclined surface 9 is at-. tached to the upper end of the tube 2. Suchan arrangement, however, will not be so eflective as the device abovedescribed.

Another construction of the locking device is shown in'Figure 3.According to this construcwith one or more inclined surfaces 9 intendedto I ski-stick is provided with tion, the lower end of the upper tubingI of the external, conical threads I5 engaging with a suitably shapednut I 6 with corresponding conical threads. When this nut is beingscrewed upwards, the wall of the lower end of th tubing I owing towedgeeffect is pressed against the tubing 2, said two tubings therebybeing locked together.

I wish it to be understood, that many different embodiments of my abovedescribed device are possible without departing from the scope of myinvention as defined by the subioined claims.

I claim:

1. A ski-stick having an adjustable shaft comprising at least twotelescopically joined shaft segments, one 61 which is hollow and forms aprising at least two telescopically joined shaft segments, one of whichis hollow and forms a handle, a cap pivotally seated in the free end ofsaid handle, a threaded rod extending axially within said handle andsupported by said cap, an expansible ring positioned within the innersegment and adjacent the telescoped portions, and

a wedge threaded upon said rod and positioned within said ring.

3. A ski-stick having an adjustable shaft comprising a handle includingtwo radially spaced concentric tubes, a tubular shalt adapted totelescopically slide within the space between said concentric tubes, theinner end of the inner concentric tube comprising an expansible ringadapted to trictionally vengage the inner walls of the overlying tubularshaft, a. wedge tor expanding said ring, said wedge being carried inthreaded engagement by a rod extending axially through the handle, and acap closing the free end of the handle and supporting said rod wherebythe locking of the adjusted tubes may be effected by the cap.

FINN TVETEN.

